Lamp



FIG. 1 is a perspective view of a lamp showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an elevational view looking from the right of FIG. 2;

FIG.4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The ornamental design for a lamp, as shown and described.